| investigation of plants used in jamaican folk medicine for anti-bacterial activity. | we have started a systematic scientific study of folklore medicinal plants currently used as alternative medicine in jamaican society. in this initial study, extracts of plants widely used by the islanders are studied for antibacterial activity against five common pathogens; streptococcus group a, staphylococcus aureus, proteus mirabilis, pseudomonas aeruginosa and escherichia coli. these studies revealed that 25% (approx.) of the plant extracts had antimicrobial activity against at least one of ... | 1999 | 10678503 |
| [allelopathic potential of volatile oil from mikania micrantha]. | mikania micrantha, an exotic plant species, is an important weed in south china. the volatile oil of the weed species had significant biological activities on plants and their pathogens, particularly pyricularia grisea. the results showed that the seeding growth of 6 plant species decreased obviously when exposed to increasing concentration (200, 400, 800, 1600 mg.l-1) of the volatile oil. the fresh weight of all test plants decreased, and the emergence of all test plants delayed for 1-2 days un ... | 2002 | 12557680 |
| development of a cryopreservation protocol for the microcyclic rust-fungus puccinia spegazzinii. | the rust fungus puccinia spegazzinii (basidiomycotina: uredinales) has been identified as a potential classical biological control agent for the invasive weed mikania micrantha (asteraceae). long-term, live storage of this pathogen is required for reference. as biotrophs, almost all rusts species cannot be preserved by traditional cryopreservation protocols, which rely on in vitro culture techniques. in addition, the embedded teliospores and delicate basidiospores of this microcyclic rust are no ... | 2003 | 12644852 |
| [progress in studies on an exotic vicious weed mikania micrantha]. | mikania micrantha is a perennial weed of astraceae native to south and central america. it has invaded southeast asia, pacific region and south china. because mikania micrantha grows very fast and is hard to control, it has become one of the world's worst weed. in this paper, the history and status of the study on mikania micrantha was reviewed. the research on mikania micrantha was mainly focused on its biology, ecology, harm and control. although some progress in the research was obtained, the ... | 2002 | 12682983 |
| new sesquiterpene dilactones from mikania micrantha. | four new sesquiterpene dilactones, mikamicranolide (1), 11 beta,13-dihydromikamicranolide (2), 3 alpha-hydroxy-11 beta,13-dihydrodeoxymikanolide (3), and 2 beta,3 beta-dihydroxy-11 beta,13-dihydrodeoxymikanolide (4), were isolated from the whole plants of mikania micrantha. their structures were elucidated on the basis of spectroscopic analysis. compounds 1 and 2 possess an unusual rearranged 12,8-germacranolide sesquiterpene skeleton. | 2004 | 15104519 |
| [bioassay on oviposition repellency of non-preferable plant extracts against citrus red mite panonychus citri]. | the oviposition repellency of the alcohol extracts from 50 species of non-preferable plants and azadirachtin against citrus red mite (panonychus citri) was determined using laboratory bioassays. in choice tests, the extracts from 42 of the 50 plant species and 1% azadirachtin (2000 x) significantly reduced oviposition 1d after treatment. the repellency effect of the extracts from the 42 plant species was better than that of azadirachtin. mikania micrantha extract had the best result, with an int ... | 2004 | 15669510 |
| influence of the obligate parasite cuscuta campestris on growth and biomass allocation of its host mikania micrantha. | as a means of biologically controlling mikania micrantha h.b.k. in south china, the influence of the obligate parasite cuscuta campestris yuncker on its growth and biomass allocation was studied using pot trials. the effect of c. campestris on m. micrantha became greater with time, such that the host biomass was only 1.8% of the control after 60 d of parasitism and by day 72 almost all the aerial parts of the host plants had died. afterwards, the hosts and the remnant parasite shoots re-grew but ... | 2005 | 15767325 |
| [correlation analysis on the damage of mikania micrantha to plant communities in neilingdind island of guandong province, china]. | the analysis showed that 58 species of trees, short-trees and shrubs in neilingding island of guangdong province were damaged by m. micrantha, of which, woody trees accounted for 67%. short-trees and sunny shrubs were damaged most seriously, followed by the communities with low canopy density consisted of only 2 dominant species, and those with high canopy density consisted of 5 or 6 dominant species. the coverage of m. micrantha mainly related to the vertical structure of plant communities. the ... | 2005 | 15852937 |
| [control effects of mikania micrantha alcohol extract on citrus red mite panonychus citri]. | this study showed that spraying 0.2 and 0.4 g x l(-1) mikania micrantha alcohol extracts on panonychus citri could significantly decrease the survival rates of p. citri eggs, larvae and nymphs, and 0.1 g x l(-1) m. micrantha alcohol extract could also significantly decrease the survival rates of larvae and nymphs. in a no-choice test, both the fecundity and the longevity of female p. citri fed on the leaves treated with all three test concentrations 0.1, 0.2 and 0.4 g x l(-1) of m. micrantha alc ... | 2005 | 16011182 |
| potential allelochemicals from an invasive weed mikania micrantha h.b.k. | phytotoxicity-directed extraction and fractionation of the aerial parts of mikania micrantha h.b.k. led to the isolation and identification of three sesquiterpenoids: dihydromikanolide, deoxymikanolide, and 2,3-epoxy-1-hydroxy-4,9-germacradiene-12,8:15,6-diolide. these sesquiterpenoids inhibited both germination and seedling growth of tested species with deoxymikanolide possessing the strongest phytotoxicity. in a bioassay against lettuce (lectuca sativa l.), deoxymikanolide reduced radicle elon ... | 2005 | 16222800 |
| the biology and taxonomy of rust fungi associated with the neotropical vine mikania micrantha, a major invasive weed in asia. | three microcyclic rust species were collected during surveys of the perennial asteraceous vine mikania micrantha (eupatorieae: asteraceae) throughout its native range in the neotropics but were absent in its invasive range in asia. the commonest species, puccinia spegazzinii with brown telioid telia, occurred wherever m. micrantha was found in south and central america including the caribbean island of trinidad. dietelia portoricensis, with occasional vestigial spermogonia and grayish-white to p ... | 2005 | 16457363 |
| population genetic variation and structure of the invasive weed mikania micrantha in southern china: consequences of rapid range expansion. | invasive plants such as mikania micrantha provide valuable opportunities for studying population genetic consequences of rapid range expansion. twenty-eight populations of m. micrantha throughout its introduced range in southern china were examined by using intersimple sequence repeat markers. population genetic parameters were estimated by bayesian approaches as well as conventional methods. bottleneck signature, multilocus linkage disequilibrium, character compatibility, and cluster analyses w ... | 2008 | 17906304 |
| antibacterial activity of some medicinal plant extracts. | antibacterial activity of hot aqueous and methanolic extracts prepared from six plants (terminallia chebula, terminallia bellerica, phyllanthus emblica, punica granatum, lawsonia alba and mikania micrantha) used in traditional folk medicines of india were screened against five pathogenic bacteria (staphylococcus aureus mtcc 2940, bacillus subtilis mtcc 441, escherichia coli mtcc 739, proteus vulgaris mtcc 426 and enterobacter aerogenes mtcc 111). the highest antibacterial potentiality was exhibi ... | 2008 | 18404337 |
| genome sequence and characterization of a new virus infecting mikania micrantha h.b.k. | the complete rna genomic sequence of a new virus infecting mikania micrantha, designated as mikania micrantha wilt virus (mmwv), has been determined. the genomic sequence and the predicted gene products of mmwv were similar to those of the other viruses of the genus fabavirus. the mmwv nucleotide sequence showed 75.6% identity to that of gentian mosaic virus, 56.6 and 57% identity to those of two broad bean wilt virus 1 isolates, and between 55.7 and 58% identity to those of seven broad bean wil ... | 2008 | 18679764 |
| antiviral constituents against respiratory viruses from mikania micrantha. | phytochemical investigation of the dried aerial parts of mikania micrantha led to the isolation of a new sesquiterpene, 3beta-acetoxy-1,10-epoxy-4-germacrene-12,8;15,6-diolide (1), along with six known constituents: 1,10-epoxy-4-germacrene-12,8;15,6-diolide (2), dihydromikanolide (3), potassium mikanin 3-sulfate (4), mikanin (5), alpinetin (6), and ergosta-7,22-dien-3beta-ol (7). their structures were elucidated by spectroscopic methods, and the molecular structures and stereochemistry of sesqui ... | 2009 | 19267453 |
| distribution, hosts, and morphological characteristics of tylenchulus palustris in florida and bermuda. | studies on the geographical distribution and hosts of tylenchulus palustris were conducted over a 3-year period in florida and bermuda. tylenchulus palustris was found on aster elliottii and liquidambar styraciflua roots in swamps of northern and central florida. it was detected also on borrichia arborescens and b. frutescens roots in tidal marshes of northern florida and coastal rocklands of southern florida and bermuda. posterior bodies of t. palustris swollen females from bermuda did not diff ... | 1990 | 19287787 |
| the antibacterial activities of mikanolide and its derivatives. | the sesquiterpene, mikanolide, was found to possess antibacterial activity. as a result, a structure-activity relationship study was carried out on mikanolide and eleven of its derivatives. | 2010 | 21291101 |
| antimicrobial constituents of the leaves of mikania micrantha h. b. k. | to isolate plant-derived compounds with antimicrobial activity from the leaves of mikania micrantha, to determine the compounds configuration, and to evaluate their antimicrobial activity against eight plant pathogenic fungi (exserohilum turcicum, colletotrichum lagenarium, pseudoperonispora cubensis, botrytis cirerea, rhizoctonia solani, phytophthora parasitica, fusarium solani, and pythium aphanidermatum,) and four plant pathogenic bacteria (gram negative bacteria: ralstonia dolaanacearum, xan ... | 2013 | 24098556 |
| in vitro evaluation of antiprotozoal and antiviral activities of extracts from argentinean mikania species. | the aim of this study was to investigate the antiprotozoal and antiviral activities of four argentinean mikania species. the organic and aqueous extracts of mikania micrantha, m. parodii, m. periplocifolia, and m. cordifolia were tested on trypanosoma cruzi epimastigotes, leishmania braziliensis promastigotes, and dengue virus type 2. the organic extract of m. micrantha was the most active against t. cruzi and l. braziliensis exhibiting a growth inhibition of 77.6 ± 4.5% and 84.9 ± 6.1%, respect ... | 2012 | 22919289 |
| antidermatophytic activity of mikania micrantha kunth: an invasive weed. | the incidence of dermatophytosis has risen dramatically in recent years. limited availability of side-effect free drugs has led to a search for new antidermatophytic agents. | 2015 | 26109783 |
| phenolic constituents from the roots of mikania micrantha and their allelopathic effects. | four new thymol derivatives, 8,10-dihydroxy-9-benzoyloxythymol (1), 9-isobutyryloxy-10-hydroxythymol (2), 7,8,9,10-tetrahydroxythymol (3), and 7,8,10-trihydroxy-9-e-feruloyloxythymol (4), were isolated from the fresh roots of mikania micrantha , along with 8,9,10-trihydroxythymol (5), 8,10-dihydroxy-9-acetoxythymol (6), 8,10-dihydroxy-9-isobutyryloxythymol (7), 8,10-dihydroxy-9-(2-methylbutyryloxy)thymol (8), 8,9-dehydro-10-hydroxythymol (9), 8-methoxy-9-hydroxythymol (10), ethyl caffeate (11), ... | 2013 | 23822807 |
| molecular cloning and characterization of two novel nac genes from mikania micrantha (asteraceae). | nac proteins, which are plant-specific transcription factors, have been identified to play important roles in plant response to stresses and in plant development. the full-length cdnas that encode 2 putative nac proteins, designated as mmataf1 and mmnap, respectively, were cloned from mikania micrantha by rapid amplification of cdna ends. the full-length cdnas of mmataf1 and mmnap were 1329 and 1072 bp, respectively, and they encoded deduced proteins of 260- and 278-amino acid residues, respecti ... | 2012 | 23079980 |
| four botanical extracts are toxic to the hispine beetle, brontispa longissima, in laboratory and semi-field trials. | the potential of botanical extracts such as celosia argenea l. (caryophyllales: amaranthaceae), ricinus communis l. (malpighiales: euphorbiaceae), mikania micrantha humboldt, bonpland & kunth (astrales: asteraceae), and catharanthus roseus (l.) g. don (gentianales: apocynaceae) for the control of brontispa longissima gestro was evaluated in a bioassay and semi-field trial. dose-response bioassay showed no significant difference in oral-toxicity among the extracts of c. argenea, m. micrantha, and ... | 2012 | 22962939 |
| structural and physiological responses of two invasive weeds, mikania micrantha and chromolaena odorata, to contrasting light and soil water conditions. | to better understand the requirement of light and soil water conditions in the invasion sites of two invasive weeds, mikania micrantha and chromolaena odorata, we investigated their structural and physiological traits in response to nine combined treatments of light [full, medium and low irradiance (li)] and soil water (full, medium and low field water content) conditions in three glasshouses. under the same light conditions, most variables for both species did not vary significantly among diffe ... | 2009 | 19030958 |